Comprehensive understanding of SO3 effects on synergies among air pollution control devices in ultra-low emission power plants burning high-sulfur coal

Experimental study on the removal of SO3 from coal-fired flue gas by alkaline sorbent

Porous materials with developed pore structures are vital to obtaining high adsorption properties. Fly ash is rich in silicon with high porosity and a large specific surface area, and it is an excellent precursor for porous silica-based sorbents. Here, we report activated calcium silicate (ACS), which was prepared by fly ash and a two-step hydrothermal method to greatly enhance the activity of the pozzolanic reaction. Of importance, the adsorption capacity of ACS for sulfur dioxide (SO2) is up to 38.2 mg g−1. The results show that ACS has a honeycomb-like structure with high porosity and a large specific surface area. The adsorption process of SO2 on ACS involves the coexistence of physical and chemical adsorption. In particular, SO2 is first attached to the surface of ACS, and then diffused into the interior of ACS. At the same time, oxygen and water vapor are adhered to the surface of ACS, and SO2 is further oxidized to sulfuric acid and sulfate. In addition, the cycling performance of ACS can remain 71.2% through the adsorption–regeneration cycle for 20 cycles, forecasting the excellent cycle stability of ACS. The ACS material can be considered a new type of adsorbent with great development potential in the removal of fly ash and sulfur dioxide from coal-fired power plants.

High adsorption activated calcium silicate enabling high-capacity adsorption for sulfur dioxide

A collaborative approach to in-situ oxysulfides and oxynitrides fixation in flue gas and energy recycling: Co-combustion of spent bleaching earth and coal

Promotional effect of sulfur trioxide (SO3) on elemental mercury removal over Cu/ZSM-5 catalyst

Study on competitive absorption of SO3 and SO2 by calcium hydroxide

Process analysis of SO3 removal by Ca(OH)2 particles from flue gas

SO3 emissions from coal-fired plants cause equipment corrosion and environmental pollution, which can be alleviated by adsorbent injection. The dynamic adsorption of SO3 by Na2SO3 was studied with ...

Kejia He

Papers

Study on competitive absorption of SO3 and SO2 by calcium hydroxide

Process analysis of SO3 removal by Ca(OH)2 particles from flue gas

SO3 Removal from Flue Gas by Using Na2SO3